This article provides an overview of the concepts involved with implementing a trading partner integration system on BizTalk Server 2000 and details the document interchange server architecture and toolset. Additionally, an early look was taken at some business process integration features planned for the production release of the product that allow easy design, execution and sharing of new business processes with trading partners. The concepts and architecture presented allow companies to prepare internal line-of-business applications and trading partners for systems that improve customer service and reduce operating costs.